ATOMIC ABSORPTION SPECTROPHOTOMETER

The PGI 990 Atomic Absorption Spectrophotometer is available in the following configuration: · Flame Only · Graphite Furnace · Combined Flame and Graphite Furnace with the option for up to nine heating ramps. The system is fully controlled from a PC with AAWin Software. The main features of the system are: · The integration of flame burner and graphite furnace in one compact unit enables automatic interchanging between the flame mode and furnace mode using few simple keystrokes. · Eight lamp turret for automatic positioning of each hollow cathode lamp. · Automatic fuel gas (C2H2) flow rate adjustment to optimize combustion in element analysis. · Automatic adjustment of burner height for optimized analysis conditions. · Automatedwavelength scanning and peak searching. · Automatic Reflecting/Transmittance beam-splitter positioning · Automatic switchover of spectral bandwidth (5 choices). · Automatic PMT and lamp current adjustment, automatic AA and BG energy balance Specification: Wavelength Range: 190nm - 900nm Monochromator: Czerny-Turner configuration Spectral Bandwidth: 0.1nm, 0.2nm, 0.4nm, 1.0nm, 2.0nm (5 steps. with automatic changeover) Wavelength Accuracy: ±0.25nm Wavelength Repeatability: 0.15nm Baseline Stability: 0.005A/30 min Flame analysis Sensitivity (Cu): 0.03 μg/ml/1% Burner Head: Titanium alloy burner Nebulizer: High-efficiency glass nebulizer Atomization Chamber: Corrosion-resistant material Position Adjustment: Automatic changeover of flame and furnace Automatic setting of optimum height for flame burner Safety: Automatic ignition and of mixing air-acetylene gas with safety control Graphite furnace analysis Character Value (Cd): 0.5Pg Temperature Range: Ambient - 2650 Heating: Voltage feedback control when drying and ashing; Optical temperature control when atomizing Heating program: Up to 9 steps with choices of ramp, temperature increase and full-power heating Data processing Analytical method: flame, graphite furnace and hydride Determination method: calibration curves using 1st , 2nd and 3rd order of fit , standard addition method Repetitions: 1-20 with calculations of average , SD and RSD Result Printout: output of parameters, data, spectra and calibration curves Mainframe Light Source: 8 hollow cathode lamp turrets with 2 lamps simultaneously lit ( one lamp pre-heated ) Power Supply: 110V/60Hz or 220V/50Hz three-phase AC 200W (mainframe) 5000W (graphite furnace) Dimensions mainframe 110 cm x 50cm x 45cm graphite furnace 50cm x 50cm x 45cm